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2007 Silverado 2500 W/T 6l80 issues


3rdgenracer

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Posted

So I bought this truck to tow my drag car. 150k miles fleet owned. Started noticing a hard shift from 2 to 3. Only happens when trans in cold( first start up) or hot(150+). Was riding through town one day and as I was slowing to stop at a light it down shifted hard, threw a check engine light and wouldn't shift back out of 1st. Pulled over, cut the truck off, started it back up noticed trans temp was around 170. Drove fine other than the 2-3 hard shift. Now and time trans temp is above 145 it will randomly repeat this. Any clue what causes this?

Posted

So I bought this truck to tow my drag car. 150k miles fleet owned. Started noticing a hard shift from 2 to 3. Only happens when trans in cold( first start up) or hot(150+). Was riding through town one day and as I was slowing to stop at a light it down shifted hard, threw a check engine light and wouldn't shift back out of 1st. Pulled over, cut the truck off, started it back up noticed trans temp was around 170. Drove fine other than the 2-3 hard shift. Now and time trans temp is above 145 it will randomly repeat this. Any clue what causes this?

The light means there is a code to diagnose ,...

 

Tell me you knew this already .... Please

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